Itchgrass (Rottboellia chochinchinensis), also referred to a raoulgrass, is an erect annual grass that reproduces by seed. Plants are pale-green in color, have short stiff hairs arising from the leaf sheath and leaf blade, and contain prop-roots near the base of the plant. The seed head is pencil-like and jointed. Mature plants may reach 10 feet in height.
Mature itchgrass plants with seeds.
Pencil-like and jointed seed head.
Cylindrical seed.
Seedling plant with seed attached.
Tillering plant with stiff hairs on leaf sheath.
Prop-roots.
Mature johnsongrass plants with seed heads.
Seedling johnsongrass.
Leaves have a prominent white mid-rib.
Rhizome johnsongrass plantlets in early spring.
Matures johnsongrass seeds.
Spreads by stolons and rhizomes.
Mature plants with seed heads.
Seedling.
Seed heads.
The LSU AgCenter and the LSU College of Agriculture